Fix setting openshift version in sendmail plugin test on Python 3
Fix setting openshift version in sendmail plugin test on Python 3

vrutkovs/osbs-client,projectatomic/osbs-client,bfontecc007/osbs-client,projectatomic/osbs-client,vrutkovs/osbs-client,jpopelka/osbs-client,DBuildService/osbs-client,jpopelka/osbs-client,DBuildService/osbs-client,bfontecc007/osbs-client